If you want to make him feel sheepish about his stamina, play the mvmt. 3 from "Moonlight" Sonate... among other uses in pop culture, it's the "chase" music from Smurfs.
If you want to just induce a depressing guilt-trip, go for mvmt. 2 of the 7th symphony by Beethoven. Gorgeous piece in any other context, but I think it would be an awfully quick bonerkill.
If you want to just induce a depressing guilt-trip, go for mvmt. 2 of the 7th symphony by Beethoven. Gorgeous piece in any other context, but I think it would be an awfully quick bonerkill.